I guess I'm an oddball....but I used to own a pair of Timpanys and after reading an article...I positioned them about 6, from the back walls and as close as possible to the sidewalls, edgewise. I used an Acoustat TNT 200 and an Audio research SP-14 tube pre and I did'nt need a sub...the bass impact and delineation was phenomenal!. The article said that planars will cancel the bass when placed too close to rearwalls, also the sidewall proximity helps quite a bit, when done properly. Hope this helps you.
Rol
Rol